strl1 = '111'
print(strl1)
strl2 = '222'
strl3 = ''' 333 '''
print(strl2)
print(strl3)

print('{0}----{1}----{2}'.format(1,2,3))
strl4='666'
print(f'这个程序{strl4}')

#print(f'{i}*{j}={i*j}')

sep = ','
print(sep.join(strl4))

strl5= 'good good study'
print("good".center(50,50))
#